$\int\sin2x\:\cos^2\:\:2x\:\:dx$
$8x^2+10xy-6y^2-5x^2+5xy-13y^2$
$\left(-\:3x^2\:y-2xseny\right)dx\:+\:\:\:\left(lny-x^3-x^2\:cosy\right)dy=0$
$\lim_{x\to\infty}\left(1+\frac{3}{2x}\right)^{\frac{4}{3x}}$
$xy'+y=-xy^2$
$\left(x^{19}\right)^5$
$r^2-6r+4$
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